Pole-top pin for multiple construction



Dec. 24, 1929. I o, AUSTIN 1,740,641

POLE TOP PIN FOR MULTIPLE CONSTRUCTION Filed July 2. 1926 3 Sheets-Sheet -l 14 23 /]J P 23 k I I 14 INVENTOR ATTORNEYS,

Dec. 24, 1929. o, AUSTIN 1,740,641

POLE TOP PIN FOR MULTIPLE CONSTRUCTION Filed July 2, 1926 4 3 Sheets-Sheet 2 INVENTOR A TTORNEY5 Patented Dec. 24, 1929 ARTHUR o. AUSTIN, or BAR-BERTON, onro, nests-Non, BY

PATENT. OFFICE MESNE ASSIGNMENTS, TO

THE OHIO BRASS COMPANY, OF MANSFIELD, OHIO, A CORPORATION OF NEW JERSEY POLE-TOP PIN FOR -MULTIPLE CONSTRUCTION Application filed July 2, 1926. Serial No. 120,093.

This invention relates to supports for attachinginsulators to. the top of transmission line poles so that a plurality of insulators may be usedto provide additional strength for supporting a line where a lineis subjected to special stresses. .7 l

: The invention. is exemplifiedinthev combi nation and arrangcmentof parts shown in the accompanying drawings and described in the following specification,and it is more particularly pointedout in. the appended claims. W j 1..

In the drawings U Fig. 1 isanelevation of a pole top showing oneembodiment ofthepresentinvention applied thereto i i U s Fig; 2is a section on line 22 of Fig. 1. Fig. 3 is a fragmentary view showing a modied formofconstruction. I f t Fig. 4 is a section on line H of Fig. 3.

. Fig. 5 is a view similar to Fig.1jshowing a modied construction.

. Fig. 6 isa sectionon line 6.6 of Fig. 5..

' V Fig. 7 is a fragmentary view showing a difs fer entmodification.

. Fig. 8 is an elevation on line 8-8 of Fig. 7. Fig. .9 .is a View similar to Fig. 1 showing another modification-.. j Fig. 10 is a bottom plan view on line 10-10 O1i Flg.'9. x i .J f Fig.:11is a fragmentary elevation showing anothermodificationh In turning angles in transmission lines at crossings or othenpointsgWhBre special mechanical strength .or;-.safe,ty-,,is required it is common-practice to usetwo insulatorsin multiple for holding cases this may readily be done by bolting the pins directly to the side of the pole. Inmost cases, however, thediameterof the insulator is such that the two insulators would over-lap or touch if they were mounted on plns secured directly to the sides'of the pole. In orderto avoid this diflicultythe present invention provides'meansfor spacing themsulators awayfrom each other. j

I In the form of onstr'uction shown in Fig. 1, the insulators 11 are. mounted on pins 12. The pins '12 have shafts of approximate uniform diameter that areperforated with transthe conductorf In some verse holes 13 near the bottom thereof. Fittings or brackets mounted on the pole and holding the pins 12 have projecting arms 14 with holes 15 therethrough of suflicient size to receive the shafts 12. Attachments preferably comprise U brackets 17 which are held in place by encircling straps 16. The lower end of the bracket 17 is bent outwardly to form the lower leg of the bracket and the end of the leg extends upwardly and is perforated to receive a thru-bolt 19. The member 17 is fastened to the pole by lag screws or bolts 20 and by the strap lfiwhich is held together by a bolt 22. The strap 16 is riveted or welded to the U bracket 17 and may be further fastened tothe pole by bolts 23. The construction is such that the regular pole top pins may be used, thus, avoiding the necessity of hav ing special pins for the places requiring double construction. The side thrust of the pins is taken up by the end of theleg 14 of the U bracket and by the thru-bolt 19. The downward thrust is supported by the thrubolt which also holdsthe pin 12 from turning, thus permitting the insulator to be screwed into place. The arrangement also permits the thru-bolt to beused to tighten up the two pins against the lower portion of the bracket and also, to attach the bracket member to the pole.

InFigs. 3 and 1 there is shown a somewhat different form of the bracket in which the end of the lower leg of the U bracket} 17 is sheared at 24 and a loop 25 is pressed downward to provide an opening for receiving the thru-bolt 19. The'openings 13 in the pins 12 Fig. 5 shows another modification of the spacer pieces at the lower ends of the brackets 17. The legs of the U shaped piece 17 are provided with holes 15 and 26 respectively which will receive the body or shaft of the pin 12. The leg of the U shaped piece 17 has a section 28 sheared and raised above the bolt 19 adjacent to the hole 26 in the legof the bracket. The bolt 19 passes through the loops 28 and also through a hole 29 in the U bracket 17. The thru-bolt 19 bears upon a clip 30 which pulls the pin 12 firmly against the side of the hole 26 and also assists to clamp the U bracket 17 tightly against the pole.

A still further modification is shown in Figs. 7 and 8 in which loops 31 are struck up from the lower legs of the U bracket 17 and are arranged at the outside of the pin 12. The lower legs of the U bracket 17 are provided with holes at 32 for receiving the lower ends of the pins 12 and the bolt 19 passes through openings in the lower end of the pin as in the previously described modifications. The holes 32 prevent lateral movement of the pins 12 and the bolt 19 supports the vertical load on the pins and holds the pins against rotation. The bolt 19 also clamps the bracket 17 against the pole.

In the form of the invention shown in Fig. 9, the bolt 19 is provided with a head 35 having a lug 36 for engaging the lower face of the bottom leg of the bracket 17. This clamps the end of the bolt 19 and the lower end of the pin 12 to the bracket 17 and prevents any upward movement of the pin 12. The opposite end of the bolt 19 may be provided with a washer 87 having a lug 38 for engaging the lower leg of the bracket 17 The washer 37 is also provided with fingers 39 which engage the pin 12. The head 35 and washer 37 will engage the ends of the legs of the bracket 17 and clamp them against the sides of the )ole.

1 In the construction shown in Fig. 11 the pair of U shaped washers 40 are interposed between the heads of the bolt 19, the legs of the washers being bifurcated to engage the pin 12.

The construction shown in Figs. 9, 10 and 11 is simple to form and holds the pins 12 against any upward movement by locking the pins to the lower ends of the bracket 17.

I claim 1. A pole top bracket comprising a plate, means for securing said plate to the side of a pole adjacent the top thereof, upper and lower arms on said plate projecting outwardly therefrom, a pin extending through an opening in the upper one of said arms, a bolt proj ecting rigidly from said pole and extending through an opening in said pin adjacent the lower one of said arm, said lower arm serving to space said pin away from said pole and an insulator carried by said pin above said pole.

2. Means for supporting a pair of insulators at the top of a pole comprising pins arranged at opposite sides of said pole, a bolt passing through said pins and through said pole, means for spacing said pins away from said pole and arms extending outwardly from said pole above said bolt, said arms having openings therethrough through which said pins extend and insulators mounted on said pins above the top of said pole.

3. Means for supporting a pair of insulators at the top of a pole comprising a bolt extending through said pole, pins having openings therethrough through which said bolt extends, said pins arranged at opposite sides of said pole, bracket plates secured to opposite sides of said pole and having arms extending outwardly and holding said pins in spaced relation to said pole at the bottom ends of said pins, said bracket plates having arms spaced upwardly from said bolt and extending outwardly from said pole, said last named arms having openings therethrough through which said pins extend and insulators mounted on said pins above the top of said pole.

1. The combination with a pole top of a pair of U brackets secured to said pole top and arranged at opposite sides of the pole with their arms extending radially therefrom and vertically spaced relative to each other,

pins extending through openings in the top arms but unsup orted against downward movement by said arms and having their lower ends held in spaced relation to said pole by the bottom arms, means other than the arms of said U brackets for supporting the weight of said pins and insulators carried by said pins above the top of said pole.

5. The combination With a pole of brackets each having a body portion engaging said pole and having vertically spaced horizontally extending arms, a band for clamping said brackets to said pole, a bolt extending through said pole and said body portions, pins having holes through their lower ends through which said bolt extends, the uppermost bracket arms having openings through which said pins extend, the lower bracket arms being arranged to hold said pins in spaced relation to said pole, and insulators carried on the tops of said pins.

6. The combination with a pole of U brackets secured to said pole and having vertically spaced radially extending arms, pins held in spaced relation to said pole and in upright position by said arms and a bolt extending through said pole and said pins for supporting said pins and preventing rotation thereof about their axes.

7. In combination, an insulator pin having a perforation therethrough, a support for said pin, a bolt projecting laterally from said support and extending through the perforation in said pin, a spacing arm secured to said support and engaging said pin to hold said pin in spaced relation with said support, a second spacing arm disposed above said first-named spacing arm and having a perforation therein through which said pin extends to hold said pin in upright position, and an insulator mounted on said pin.

8. In combination, a supporting pole, a

pair of U-brackets secured to said pole at opposite sides thereof adjacent the top of said pole, the legs of said respective U-brackets being spaced vertically relative to each other, a bolt extending through said supporting pole, insulator pins having transverse perforations therein through which opposite ends of said bolt extend, said pins engaging the lower arms of said U-brackets respectively and being held in contact therewith by said bolt and spaced outwardly from said pole by said arms, the upper arms of said U-brackets having perforations therethrough through which said pins extend, and insulators carried by said pins above the top of said pole and projecting over said pole.

In testimony whereof I have signed my name to this specification on this 29th day of June A.D. 1926.

ARTHUR O. AUSTIN. 

